Alright, let's work through 54103001 times 15795317 step by step
54103001 × 15795317 = 15795317 × (54103001)
+ 15795317 × 1 giving us 15795317
+ 15795317 × 00 producing 0
+ 15795317 × 000 what gives us 0
+ 15795317 × 3000 what gives us 47385951000
+ 15795317 × 00000 yielding 0
+ 15795317 × 100000 what gives us 1579531700000
+ 15795317 × 4000000 that equals 63181268000000
+ 15795317 × 50000000 that equals 789765850000000

= 854574051446317
